`a, -> x - 1 =5`
`-> x = 6`
`b, -> 2x + 1=7`
`-> x = 3`
`c, (x-1)^2 = 36`
`->` \(\left[{}\begin{matrix}x-1=6\\x-1=-6\end{matrix}\right.\)
`->` \(\left[{}\begin{matrix}x=7\\x=-5\end{matrix}\right.\)
`d, -> (x-2)^2 = 4`
`->` \(\left[{}\begin{matrix}x-2=2\\x-2=-2\end{matrix}\right.\)
`->` \(\left[{}\begin{matrix}x=4\\x=0\end{matrix}\right.\)
`e, -> x^2 = 180 : 5`
`x^2 = 36`
`->` \(\left[{}\begin{matrix}x=6\\x=-6\end{matrix}\right.\)
\(1,\left(x-1\right)^3=5^3\\ x-1=5\\ x=6\\ 2,2x+1=7\\ 2x=6\\ x=3\\ 3,\left(x-1\right)^2=36\\ \left[{}\begin{matrix}x-1=6\\x-1=-6\end{matrix}\right.=>x=7;x=-5\\ 4,\left(x-2\right)^2=4\\ \left[{}\begin{matrix}x-2=2\\x-2=-2\end{matrix}\right.=>x=4;x=0\\ 5,5x^2=180\\ x^2=36\\ =>x=-6;x=6\)
`1)`
`(x-1)^3 =125`
`=>(x-1)^3 =5^3`
`=>x-1=5`
`=>x=5+1`
`=>x=6`
`2)`
`(2x+1)^3= 343`
`=>( 2x + 1)^3 =7^3`
`=>2x+1=7`
`=> 2x=7-1`
`=>2x=6`
`=>x=6:2`
`=>x=3`
`3)`
`(x-1)^2-9=27`
`=> ( x - 1) ^2= 27 + 9`
`=> ( x - 1) ^2= 36`
`=> (x-1)^2=6`
`Th1`
`->x-1=6`
`=>x=6+1`
`=>x=7`
`Th2`
`->x-1=-6`
`=>x=-6+1`
`=>x= -5`
`4)`
`3 .( x - 2 )^2= 12`
`=>(x-2)^2=12:3`
`=>x-2=4`
`Th1`
`->x-2=4`
`=>x=4+2`
`=>x=6`
`Th2`
`->x-2=-4`
`=>x=-4+2`
`=>x= -2`
`5)`
`3x^2 + 2 x^2 = 180`
`=> (3+2).x^2=180`
`=> x^2= 180:5`
`=>x^2=36`
`=>x=6` hoặc `-6`
